Blogs | Freeform Polymers

Blogs

At Freeform Polymers, we make plastic injection molding simpler for businesses. Our blog shares what we learn on the shop floor every day. You will find everything from injection molding, mold making, machining, assembly, and more. Use this knowledge to plan your next project with more confidence.

Massive colorful collection of used plastic bottles and containers in a recycling center.

Which Plastic Is the Most Toxic? A Manufacturer’s Guide to Safer Resin Choices in Injection Molding

Justin Brown May 28, 2026 No Comments

When you design a product, the resin you pick matters as much as the shape. Choose the wrong one and you could face recalls, failed compliance reviews, or unhappy end…

Detailed view of a 3D printer nozzle working in a modern manufacturing setting.

Which Is Cheaper: 3D Printing or Injection Molding? A Cost Breakdown for Product Teams

Justin Brown May 28, 2026 No Comments

You are about to greenlight a part for production. You have seen 3D printing quotes that look reasonable per piece. You have seen plastic injection molding quotes with a scary…

What Are the Three Unsafe Plastics? A Manufacturer’s Guide to Resins to Avoid

Justin Brown April 23, 2026 No Comments

Flip over a plastic container and you’ll see a small number inside a triangle. That number is the resin code. Three of those numbers get flagged for safety concerns more…

The 7 Most Common Plastic Molding Defects (And How a Quality Plastic Molding Service Prevents Them)

Justin Brown April 23, 2026 No Comments

You open a sample box from your molder. The parts look off. One has a line running down the face. Another has a dent that wasn’t in the CAD. A…

What Is the Rule of Thumb for Injection Molding? Draft Angle Guidelines Explained

Justin Brown April 17, 2026 No Comments

You’ve finalized your CAD model, chosen your resin, and you’re ready to go to tooling — but have you checked your draft angles? Skipping this step is one of the…

The Future of Plastic Molding: Trends Shaping How Parts Get Made

Justin Brown April 17, 2026 No Comments

Plastic molding hasn’t stood still. In the last few years, automation, supply chain disruption, and sustainability pressure have reshaped how parts get made — and how buyers choose who makes…

Close-up of White Plastic Screw Caps in Bulk

Production Volumes in Plastic Molding: How to Choose the Right Run Size

Justin Brown April 9, 2026 No Comments

You’ve got a solid part design and a manufacturer ready to quote. Then they ask: “What’s your production volume?” Most buyers pause here. Too low and you’re overpaying per unit.…

3d render of a modern landscape of extruding hexagons

What Plastic Is Best for Injection Molding? A Material Selection Guide

Justin Brown April 9, 2026 No Comments

Your part is designed. Your CAD file is clean. But one question stands between you and production: what plastic are you running? That choice affects more than cost. It determines…